Abstract
It is possible to improve resistance of high-strength light-weight concrete to freezing and thawing by using the new mixing procedure, in which both mixing water and cement are divided into two and added. In this paper, the mechanism of improvement on resistance of high-strength light-weight concrete to freezing and thawing was studied experimentally. As the results, the causes of this improvement were as follows : (1) flaws in concrete were reduced by reducing bleeding. (2) surface properties of light-weight coarse aggregates were improved by enveloping coarse aggregates with cement paste and the bond strength between coarse aggregates and mortar matrix in concrete was strengthened.
